Research Progress of Enzyme-free Electrochemical Sensors for Glucose Based on Transition Metals
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Abstract:
Glucose sensors are widely used in the food industry, and the glucose content is strictly controlled in fermentation production, beverage preparation, and dairy product production. Therefore, it is of great significance to construct a new method for rapid glucose detection. Since transition metal-based sensing materials have the characteristics of rapid response, high sensitivity, good stability, and low cost, they show unique advantages in the field of enzyme-free electrochemical sensors for glucose. Therefore, based on the recent experimental and theoretical studies, this paper provides a systematic review of the recent research progress of transition metal-based enzyme-free electrochemical sensors for glucose. The characteristics of nanostructures of transition metals such as copper (Cu), nickel (Ni), cobalt (Co) and zinc (Zn), and the sensing mechanisms of their oxides for glucose under alkaline conditions, as well as the methods for preparing modified electrodes including electrodeposition, are summarized, in order to provide reference for the construction of high-performance glucose sensor. This review specifically highlights the importance of uncovering the electrical signal sensitivity-enhancing mechanism of transition metal towards glucose, to enable on-demand design and expand the application of transition metal sensors.
